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Here's the scenario:
Phone's battery is dead.
You go to plug in the phone.
From here, I'd like the phone to automatically turn itself ON once it detects a power source.
What's the best way to do this? Is there an android solution or would this take a custom ROM or something lower-level?
This could be done only on hardware level. No software could power up phone if it is truly off - not in sleep or any other passive state.
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I am new to android. I am currently looking for developing a android application which quickly needs to enable my application.
It may be pressing a power button or volume button in a specific pattern or taping the screen continuously.
I doesn't want to use the screen light on or off since it activates my application for some random reason.
Android does not have a built in feature that lets you run an application by pressing the hardware keys.
A possible solution would be to run a service that intercept the volume keys (https://stackoverflow.com/a/7130685/2804473). This solution will probably be too intrusive for the end user though.
I would not recommend your proposed idea. Instead, play by the given "rules" that the Android environment provides. You might want to use a Widget instead? If the hardware-trigger is that important, maybe you should take a look at accessories such as Pressy (https://play.google.com/store/apps/details?id=com.pressy.app) or similar?
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I'm trying to break the current of a car battery for an x period of time. Any input will be greatly appreciated.
Get an arduino board and a relay capable of switching a 12v circuit. Also get a wifi / bluetooth add on board so you can communicate with the arduino from your smartphone platform of choice.
Here is an example of an arduinos capability, this particular example is using bluetooth.
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Is it possible to enable a driving mode like that found on the Galaxy S phones when the user presses a button?
Or is this not built into all android phones?
You can create such a "mode" using Tasker (found in the Play Store). Basically you set up actions that occur based on certain events (such as a button press). Actions include changing brightness/volume settings, triggering apps etc...
For example, I created a button that sets me "Available"/"Unavailale" for phone calls - it doesn't just turn the ringer off, it shoots the callers right to VM...
It takes a bit of work (and isn't free), but Tasker is pretty powerful & you can typically find help online fairly easily.
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I would like to ask what studies are needed for me turn my smartphone into a wireless keyboard and use for desktop/laptop/etc...? How could I achieve this step by step? Thanks a lot for helping.
You would require an app which has a keyboard layout (or just use the android softkey) and send the key press code to a computer via Bluetooth.
You computer should have an interface software that can receive you incoming keystroke signal and convert that into the OS signal.
Actually there is an app in the market which has the same functionality
https://play.google.com/store/apps/details?id=com.iandrobot.andromouse.lite&hl=en
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I was looking for an app for phones (iPhone, Android and SmartPhone - any or all) that would simply run in the background and place any scanned upc code digits into the currently active textbox.
I've Googled for quite a while and only found an Android app that actually replaces the keyboard of the phone.
It seems like it should be easy (I have many for PCs) but I haven't done any handheld programming since Windows CE days so I don't know if this is possible (can apps see other apps controls in these phones).
Has anyone ever come across an app like this?
use the iphone sdk from zbar and you can do it inside your app.
You cannot do this system wide. You can only add this functionality to your apps.
This question is very similar Take a look. Android Long Press on Edit Text behavior